Inherintance Mapping metode MappedSuperclass

Hai, di materi kali ini saya mau ngebahas tentang Inherintance Mapping dengan Metode MappedSuperclass. Untuk mencoba mapping ini, kita membutuhkan 2 tabel yang memiliki column yang hampir sama contohnya mobil sama motor berikut adalah perancangan databasenya:

Implementasi Entity superclass:

	package com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity;

	import lombok.AllArgsConstructor;
	import lombok.Data;
	import lombok.NoArgsConstructor;
	import lombok.experimental.SuperBuilder;

	import javax.persistence.Column;
	import javax.persistence.MappedSuperclass;

	@Data
	@AllArgsConstructor
	@NoArgsConstructor
	@SuperBuilder
	@MappedSuperclass
	public class KendaraanMappedSuperclass {

	@Column(name = "nama", length = 50)
	private String nama;
	@Column(name = "jumlah_roda", length = 2)
	private Integer jumlahRoda;
	@Column(name = "jumlah_cylinder", length = 3)
	private Integer jumlahCylinder;
	@Column(name = "cc", length = 4)
	private Integer cc;
	@Column(name = "nama_pabrikan", nullable = false, length = 50)
	private String namaPabrikan;
	}

view raw KendaraanMappedSuperclass.java hosted with ❤ by GitHub

Implementasi Entity child mobil:

	package com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity;

	import lombok.*;
	import lombok.experimental.SuperBuilder;
	import org.hibernate.annotations.GenericGenerator;

	import javax.persistence.*;

	@Data
	@ToString(callSuper = true)
	@AllArgsConstructor
	@NoArgsConstructor
	@EqualsAndHashCode(callSuper = true)
	@SuperBuilder
	@Entity
	@Table(name = "mobil_mappedsuperclass", schema = "inherintance")
	@GenericGenerator(name = "uuid_gen", strategy = "uuid2")
	public class MobilMappedSuperclass extends KendaraanMappedSuperclass {

	@Id
	@GeneratedValue(generator = "uuid_gen")
	@Column(name = "id", length = 64)
	private String id;

	@Column(name = "jumlah_kursi", length = 1)
	private Integer jumlahKursi;

	@Column(name = "is_all_wheel_drive", nullable = false)
	private boolean allWheelDrive;

	}

view raw MobilMappedSuperclass.java hosted with ❤ by GitHub

Implementasi Entity child motor:

	package com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity;

	import lombok.*;
	import lombok.experimental.SuperBuilder;
	import org.hibernate.annotations.GenericGenerator;

	import javax.persistence.*;

	@Data
	@ToString(callSuper = true)
	@AllArgsConstructor
	@NoArgsConstructor
	@EqualsAndHashCode(callSuper = true)
	@SuperBuilder
	@Entity
	@Table(name = "motor_mappedsuperclass", schema = "inherintance")
	@GenericGenerator(name = "uuid_gen", strategy = "uuid2")
	public class MotorMappedSuperClass extends KendaraanMappedSuperclass {

	@Id
	@GeneratedValue(generator = "uuid_gen")
	@Column(name = "id", length = 64)
	private String id;

	@Column(name = "jenis_rantai")
	private String jenisRantai;
	}

view raw MotorMappedSuperClass.java hosted with ❤ by GitHub

Implementasi DAO untuk mobil:

	package com.maryanto.dimas.bootcamp.example.mapping.inherintance.dao;

	import com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity.MobilMappedSuperclass;
	import com.maryanto.dimas.bootcamp.example.repository.CrudRepository;
	import org.hibernate.HibernateException;
	import org.hibernate.Session;

	import java.util.List;
	import java.util.Optional;

	public class MobilMappedSuperClassDao implements CrudRepository<MobilMappedSuperclass, String> {

	private Session session;

	public MobilMappedSuperClassDao(Session session) {
	this.session = session;
	}

	@Override
	public MobilMappedSuperclass save(MobilMappedSuperclass value) throws HibernateException {
	String returnKey = (String) this.session.save(value);
	value.setId(returnKey);
	return value;
	}

	@Override
	public MobilMappedSuperclass update(MobilMappedSuperclass value) throws HibernateException {
	this.session.update(value);
	return value;
	}

	@Override
	public boolean removeById(String value) throws HibernateException {
	throw new UnsupportedOperationException();
	}

	@Override
	public Optional<MobilMappedSuperclass> findById(String value) throws HibernateException {
	MobilMappedSuperclass mobil = this.session.find(MobilMappedSuperclass.class, value);
	return mobil != null ? Optional.of(mobil) : Optional.empty();
	}

	@Override
	public List<MobilMappedSuperclass> findAll() throws HibernateException {
	throw new UnsupportedOperationException();
	}
	}

view raw MobilMappedSuperClassDao.java hosted with ❤ by GitHub

Implementasi DAO untuk motor:

	package com.maryanto.dimas.bootcamp.example.mapping.inherintance.dao;

	import com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity.MotorMappedSuperClass;
	import com.maryanto.dimas.bootcamp.example.repository.CrudRepository;
	import org.hibernate.HibernateException;
	import org.hibernate.Session;

	import java.util.List;
	import java.util.Optional;

	public class MotorMappedSuperClassDao implements CrudRepository<MotorMappedSuperClass, String> {

	private Session session;

	public MotorMappedSuperClassDao(Session session) {
	this.session = session;
	}

	@Override
	public MotorMappedSuperClass save(MotorMappedSuperClass value) throws HibernateException {
	String returnKey = (String) this.session.save(value);
	value.setId(returnKey);
	return value;
	}

	@Override
	public MotorMappedSuperClass update(MotorMappedSuperClass value) throws HibernateException {
	this.session.update(value);
	return value;
	}

	@Override
	public boolean removeById(String value) throws HibernateException {
	throw new UnsupportedOperationException();
	}

	@Override
	public Optional<MotorMappedSuperClass> findById(String value) throws HibernateException {
	MotorMappedSuperClass motor = this.session.find(MotorMappedSuperClass.class, value);
	return motor != null ? Optional.of(motor) : Optional.empty();
	}

	@Override
	public List<MotorMappedSuperClass> findAll() throws HibernateException {
	throw new UnsupportedOperationException();
	}
	}

view raw MotorMappedSuperClassDao.java hosted with ❤ by GitHub

Kemudian kita buat unit testingnya seperti berikut:

	package com.maryanto.dimas.bootcamp.test.mapping.inherintance;

	import com.maryanto.dimas.bootcamp.example.config.HibernateConfiguration;
	import com.maryanto.dimas.bootcamp.example.mapping.inherintance.dao.MobilMappedSuperClassDao;
	import com.maryanto.dimas.bootcamp.example.mapping.inherintance.dao.MotorMappedSuperClassDao;
	import com.maryanto.dimas.bootcamp.example.mapping.inherintance.entity.MobilMappedSuperclass;
	import junit.framework.TestCase;
	import lombok.extern.slf4j.Slf4j;
	import org.hibernate.Session;
	import org.hibernate.Transaction;
	import org.junit.Ignore;
	import org.junit.Test;

	import java.util.Optional;

	@Ignore
	@Slf4j
	public class TestMappedSuperClass extends TestCase {

	private Session session;
	private MobilMappedSuperClassDao mobilDao;
	private MotorMappedSuperClassDao motorDao;

	@Override
	protected void setUp() throws Exception {
	log.info("init hibernate session");
	this.session = HibernateConfiguration.getSession();
	this.mobilDao = new MobilMappedSuperClassDao(session);
	this.motorDao = new MotorMappedSuperClassDao(session);
	}

	@Test
	public void testSaveMobil() {
	MobilMappedSuperclass hondaBrio = MobilMappedSuperclass.builder()
	.nama("Honda BRIO")
	.allWheelDrive(false)
	.cc(1000)
	.jumlahCylinder(4)
	.jumlahKursi(4)
	.jumlahRoda(4)
	.namaPabrikan("PT. Honda Motor Company")
	.build();

	Transaction trx = this.session.beginTransaction();
	hondaBrio = this.mobilDao.save(hondaBrio);
	trx.commit();

	Optional<MobilMappedSuperclass> optional = this.mobilDao.findById(hondaBrio.getId());
	assertTrue("mobil is present", optional.isPresent());
	hondaBrio = optional.get();
	log.info("mobil: {}", hondaBrio);
	}

	@Override
	protected void tearDown() throws Exception {
	log.info("destroy hibernate session!");
	this.session.close();
	}
	}

view raw TestMappedSuperClass.java hosted with ❤ by GitHub

Jika di running maka hasilnya seperti berikut:

INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@1e1e837d] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Hibernate: 
    
    create table inherintance.mobil_mappedsuperclass (
       id varchar(64) not null,
        cc int4,
        jumlah_cylinder int4,
        jumlah_roda int4,
        nama varchar(50),
        nama_pabrikan varchar(50) not null,
        is_all_wheel_drive boolean not null,
        jumlah_kursi int4,
        primary key (id)
    )
Hibernate: 
    
    create table inherintance.motor_mappedsuperclass (
       id varchar(64) not null,
        cc int4,
        jumlah_cylinder int4,
        jumlah_roda int4,
        nama varchar(50),
        nama_pabrikan varchar(50) not null,
        jenis_rantai varchar(255),
        primary key (id)
    )
Jan 16, 2021 12:00:08 PM org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator initiateService
INFO: HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
Hibernate: 
    insert 
    into
        inherintance.mobil_mappedsuperclass
        (cc, jumlah_cylinder, jumlah_roda, nama, nama_pabrikan, is_all_wheel_drive, jumlah_kursi, id) 
    values
        (?, ?, ?, ?, ?, ?, ?, ?)
[main] INFO com.maryanto.dimas.bootcamp.test.mapping.inherintance.TestMappedSuperClass - mobil: MobilMappedSuperclass(super=KendaraanMappedSuperclass(nama=Honda BRIO, jumlahRoda=4, jumlahCylinder=4, cc=1000, namaPabrikan=PT. Honda Motor Company), id=c5a7398c-a79c-4abd-9c55-deb3ec1e2bad, jumlahKursi=4, allWheelDrive=false)
[main] INFO com.maryanto.dimas.bootcamp.test.mapping.inherintance.TestMappedSuperClass - destroy hibernate session!

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Referensi

https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#entity-inheritance-mapped-superclass

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Inherintance Mapping metode MappedSuperclass

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Referensi